Brian Behlendorf dd487640b2 Linux 5.10 compat: restore custom uio_prefaultpages() ...

As part of commit 1c2358c1 the custom uio_prefaultpages() code
was removed in favor of using the generic kernel provided
iov_iter_fault_in_readable() interface.  Unfortunately, it
turns out that up until the Linux 4.7 kernel the function would
only ever fault in the first iovec of the iov_iter.  The result
being uiomove_iov() may hang waiting for the page.

This commit effectively restores the custom uio_prefaultpages()
pages code for Linux 4.9 and earlier kernels which contain the
troublesome version of iov_iter_fault_in_readable().

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #11463 
Closes #11484

2021-01-22 09:58:49 -08:00

..

freebsd

Remove redundant oid parameter to update_pages

2020-12-23 14:34:59 -08:00

linux

Linux 5.10 compat: restore custom uio_prefaultpages()

2021-01-22 09:58:49 -08:00